RU2798859C1 - Water treatment plant - Google Patents

Abstract

FIELD: water treatment.

SUBSTANCE: devices designed for the purification of drinking and waste water by their coagulation treatment with liquid reagents. The water treatment plant contains a treated water supply unit, a housing, a flow distributor and a thin-layer purification module made in the form of a stack of inclined plates. The housing cavity is made in the form of a rectangular parallelepiped with a ratio of width, length and height as 1:2:2 and is divided by partitions into sequentially placed and connected water treatment chamber, a thin-layer purification module and a filtration chamber. The thin-layer purification module is connected with the water treatment chamber above and below the first partition, consisting of the upper vertical part and the lower inclined part with a length of at least the length of the thin-layer module plate, and with the filtration chamber - above the second partition, consisting of the upper inclined part with a length of at least plates of the thin-layer purification module and the lower vertical part. The lower edges of the inclined parts of the first and second partitions are offset relative to the corresponding upper edges towards the filtration chamber so that the stack of inclined plates placed between these inclined parts is at an angle of 60° relative to the bottom of the cavity. The inclined plates of the thin-layer purification module are profiled and arranged to ensure contact, forming through longitudinal channels of a closed cross section. The treated water supply unit is in communication with the water treatment chamber and its outlet is located above the first horizontal grate with a mesh size of 5 mm, the area of which is limited by the housing walls and the upper vertical part of the first partition. In the water treatment chamber there is a third partition with an inclination towards the filtration chamber and at an angle of 30° relative to the bottom of the cavity, the upper edge of which is rigidly connected to the transverse wall of the housing, and the lower edge is located below the first partition. For all partitions, the side edges are rigidly attached to the longitudinal walls of the housing, and the upper and lower edges are oriented perpendicular to the longitudinal walls of the housing. In the gap between the lower edges of the first and third partitions, a flow distributor is installed in the form of elements oriented perpendicular to the longitudinal walls of the housing and arranged parallel to each other with the formation of a gap between them. In the space of the water treatment chamber, limited by the housing walls, the first horizontal grate, the first and third partitions and the flow distributor, there is a floating load in the form of polystyrene foam cubes. In the filtration chamber there is a filtering load, bounded from above by a second horizontal grate, above which there are sensors for pH and the upper level of coagulated water. In the lower part of the filtration chamber there is a low level sensor and a perforated filtered water outlet pipeline. The treated water supply unit is made in the form of a pipeline with a diameter of 4% of the width of the housing cavity, oriented vertically and equipped with three branch pipes for pressure supply of reagents placed in series and from bottom to top, the distance between which is 35% of the width of the housing cavity.

EFFECT: reduction of weight and size characteristics by combining water treatment chambers, filtration and a thin-layer purification module in a single housing; increasing the efficiency of the extraction of dissolved and suspended substances; expansion of functionality due to the possibility of varying the number (no more than three), types and ratio of chemical reagents, the size of the floating load, as well as the amount of filter load; automation of the water treatment process.

3 cl, 1 dwg, 1 tbl

Description

The invention relates to devices designed for the purification of drinking and waste water by their coagulation treatment with liquid reagents.

A sump is known, including a housing, the cavity of which is divided by means of an inclined partition into a successively placed flocculation chamber and a thin-layer module in the form of inclined tubular elements arranged in parallel rows, a device for supplying purified water and removing clarified water and a pipe for removing sediment located in the lower part cases (see RF patent No. 2019259, IPC B01D 21/02, B01D 21/08, C02F 1/52, C02F 101/20, C02F 103/16, publication date 09/15/1994).

The design of the known technical solution does not imply the preparation and use of reagents for coagulation, as well as additional filtration of clarified water.

As the closest analogue, a water treatment plant was adopted, containing a filter equipped with a clarified water outlet, a treated water supply unit and a housing, the cavity of which is divided by a partition into a water treatment chamber, at the outlet of which a flow distributor is installed, and a thin-layer purification module made in in the form of a package of inclined plates, and the water treatment chamber is connected with the thin-layer purification module above the partition and with the treated water supply unit (see RF patent No. 34162, IPC C02F 1/24, publication date 11/27/2003).

As disadvantages of the closest analogue, the following can be indicated:

- high weight and size characteristics due to the separate location of technological units;

- the design does not imply the possibility of washing and regenerating the sorption filter;

- the presence of an open water surface in the upper part of the body causes increased humidity and the presence of sewer odors;

- the need to remove two types of sediment from opposite parts of the body.

The task to be solved by the claimed invention is the development of a compact installation for reagent water treatment, providing high efficiency of extracting dissolved and suspended substances from water by coagulation and operating in automatic mode.

The technical result, which manifests itself in solving the problem, is expressed as follows:

- reduction of weight and size characteristics by combining water treatment chambers, filtration and a thin-layer purification module in a single housing;

- improving the efficiency of the extraction of dissolved and suspended solids with the formation of coagulated flakes, which can be conveniently removed or partially recycled;

- expansion of functionality due to the possibility of varying the number (no more than three), types and ratio of chemical reagents, the size of the floating load, as well as the amount of filter load;

- automation of the water treatment process.

The problem is solved by the fact that a water treatment plant containing a treated water supply unit, a housing, the cavity of which is divided into chambers, a flow distributor and a thin-layer cleaning module, made in the form of a package of inclined plates, characterized in that the housing cavity is made in the form of a rectangular parallelepiped with a ratio of width, length and height as 1:2:2 and is divided by partitions into sequentially placed and communicated water treatment chamber, a thin-layer purification module and a filtration chamber, and the thin-layer purification module is in communication with the water treatment chamber above and below the first partition, consisting of an upper vertical part and lower inclined part with a length not less than the length of the thin-layer module plate, and with a filtration chamber - above the second partition, consisting of an upper inclined part with a length not less than the length of the thin-layer module plate and the lower vertical part, and the lower edges of the inclined parts of the first and second partitions are displaced relative to the corresponding upper edges towards the filtration chamber so that the stack of inclined plates placed between the indicated inclined parts is located at an angle of 60° relative to the bottom of the cavity, and the inclined plates of the thin-layer cleaning module are profiled and arranged to ensure contact, forming through longitudinal channels of a closed cross-section, in addition, the unit for supplying water to be treated is connected to the water treatment chamber and its outlet is located above the first horizontal grate with a cell size of 5 mm, the area of \u200b\u200bwhich is limited by the walls of the housing and the upper vertical part of the first partition, while in the water treatment chamber there is the third partition with a slope towards the filtration chamber and at an angle of 30° relative to the bottom of the cavity, the upper edge of which is rigidly connected to the transverse wall of the housing, and the lower edge is located below the first partition, in addition, for all partitions, the side edges are rigidly attached to the longitudinal walls of the housing, and the upper and lower edges are oriented perpendicular to the longitudinal walls of the housing, and in the gap between the lower edges of the first and third partitions, a flow distributor is installed in the form of elements oriented perpendicular to the longitudinal walls of the housing and located parallel to each other with the formation of a gap between them, while the elements of the flow distributor are made with l-shaped cross-sections, the tops of which lie in a common plane and are directed towards the outlet of the treated water supply unit, and at the bottom of the water treatment chamber there is a sediment removal pipeline, in addition, in the space of the water treatment chamber, limited by the walls of the housing, the first horizontal grate, the first and third partitions and the flow distributor, there is a floating load in the form of polystyrene foam cubes with a side size of 10-20 mm, the total volume of which is ½ of the volume of the body cavity, a filter load is located in the filtration chamber, which is used as granules of crushed PSBS fraction 3 mm, bounded from above by a second horizontal grate with a mesh size of 1 mm, above which there are sensors for pH and the upper level of coagulated water, and in the lower part of the filtration chamber there is a lower level sensor and a perforated filtered water outlet pipeline, in addition, the treated water supply unit is made in the form of a pipeline with a diameter of 4% of the width of the body cavity, oriented vertically and equipped with three branch pipes for pressure supply of reagents placed in series and from bottom to top, the distance between which is 35% of the width of the body cavity.

In addition, a grid is fixed at the inlet of the perforated filtered water outlet pipeline.

In addition, between the first and second partitions vertically, with the formation of a horizontal gap with the upper edge of the second partition, a fourth partition is installed, the side edges of which are rigidly attached to the longitudinal walls of the housing.

Comparative analysis of the features of the claimed invention with the features of the prototype and analogues indicates the compliance of the proposed solution with the criterion of "novelty".

At the same time, the distinctive features of the claims provide a solution to the following functional problems.

The feature "the body cavity is made in the form of a rectangular parallelepiped with a ratio of width, length and height as 1:2:2" provides a reduction in weight and size characteristics with an optimal ratio of chamber and module volumes.

The sign "thin-layer purification module is connected with the water treatment chamber above the first partition" organizes the possibility of an emergency overflow.

The sign "thin-layer purification module is in communication with the filtration chamber above the second partition" sets the direction of movement of the coagulated water.

Features “the body cavity is divided by partitions into sequentially placed and connected water treatment chamber, a thin-layer purification module and a filtration chamber”, “the first partition consists of an upper vertical part and a lower inclined part with a length not less than the length of the thin-layer module plate, the second partition consists of an upper inclined parts with a length not less than the length of the plate of the thin-layer cleaning module and the lower vertical part" and "for all partitions, the side edges are rigidly attached to the longitudinal walls of the housing, and the upper and lower edges are oriented perpendicular to the longitudinal walls of the housing" organize the division of the housing cavity.

Signs “the lower edges of the inclined parts of the first and second partitions are displaced relative to the corresponding upper edges towards the filtration chamber so that the stack of inclined plates placed between the indicated inclined parts is located at an angle of 60 ° relative to the bottom of the cavity” and “the inclined plates of the thin-layer cleaning module are made profiled and located with contact, forming through longitudinal channels of a closed cross section” describe the design and orientation of the stack of inclined plates that provide separation and sedimentation of coagulated water sediment as it moves from bottom to top through the thin-layer purification module.

The signs “the output of the treated water supply unit is located above the first horizontal grate with a mesh size of 5 mm, the area of which is limited by the walls of the housing and the upper vertical part of the first partition” provide:

- suppression of the pressure of the treated water when it is supplied to the body of the device;

- laminar movement of treated water in the water treatment chamber;

- convenience of cleaning the upper part of the water treatment chamber from large debris;

- prevention of floating loading and/or removal from the body cavity.

The features of the second dependent claim provide for the convenience of cleaning the upper part of the housing cavity from small floating debris.

Signs “the thin-layer purification module is in communication with the water treatment chamber below the first partition, in the water treatment chamber there is a third partition with a slope towards the filtration chamber and at an angle of 30 ° relative to the bottom of the cavity, the upper edge of which is rigidly connected to the transverse wall of the housing, and the lower one is placed below of the first baffle, and in the gap between the lower edges of the first and third baffles, a flow distributor is installed in the form of elements oriented perpendicular to the longitudinal walls of the housing and arranged parallel to each other with the formation of a gap between them, while the elements of the flow distributor are made with L-shaped cross sections, tops which lie in a common plane and are directed towards the outlet of the purified water supply unit" set the direction of movement of the purified water with distribution into flows at the inlet to the thin-layer purification module.

Signs “in the space of the water treatment chamber, limited by the walls of the housing, the first horizontal grate, the first and third partitions and the flow distributor, a floating load is placed in the form of cubes of polystyrene foam with a side size of 10-20 mm, the total volume of which is ½ of the volume of the housing cavity » describe the characteristics and location of the floating load, which makes it possible to divide the total fluid flow, which includes water and chemicals mixed with each other, into a plurality of predominantly laminar jets that contribute to the formation of coagulated flocs.

The signs “there is a filter bed in the filtration chamber, which is used as crushed PSBS granules with a fraction of 3 mm” describe the characteristics of the filter bed, which can be regenerated and allows you to further purify the coagulated water.

The sign "the filtering load is limited from above by a second horizontal grate with a mesh size of 1 mm" and the sign of the first dependent claim prevent the filtering load from floating up and/or removing it from the body cavity.

The features “pH and coagulated water upper level sensors are placed above the second horizontal grate, and a lower level sensor is placed in the lower part of the filtration chamber” provide automation of the water treatment process.

The sign "a sludge removal pipeline is installed at the bottom of the water treatment chamber" allows you to remove the reagent sludge, some of which can be recirculated.

The features “the unit for supplying purified water is made in the form of a pipeline with a diameter of 4% of the width of the body cavity, oriented vertically and equipped with three nozzles for the pressure supply of reagents placed in series and from bottom to top, the distance between which is 35% of the width of the body cavity” describe the design of the supply unit, which promotes pressure and linear supply of liquid and provides intensive, controlled and staged pre-mixing of treated water with separately introduced chemical reagents.

In FIG. shows a longitudinal section of the device.

The drawing shows the housing 1, the water treatment chamber 2, the thin-layer purification module 3, the filtration chamber 4, the upper vertical 5 and lower inclined 6 parts of the first partition, the upper inclined 7 and lower vertical 8 parts of the second partition, the third 9 and fourth 10 partitions, the first 11 and second 12 horizontal gratings, inclined plates 13 of the thin-layer cleaning module 3, floating 14 and filtering 15 downloads, elements 16 of the flow distributor, pipeline 17 for removing sediment and perforated pipeline 18 for removing filtered water, pipeline 19, nozzles 20 for pressurized supply of reagents, shutter 21 and a flow meter 22 of the purified water supply unit, pH 23 and upper level sensors 24 of coagulated water, sensor 25 of the lower level of filtered water outlet.

The installation contains a housing 1, the cavity of which is made in the form of a rectangular parallelepiped with a ratio of width, length and height as 1:2:2.

The cavity of the housing 1 is divided into successively placed and communicated water treatment chamber 2, a thin-layer cleaning module 3 and a filtration chamber 4.

Inclined plates 13 are profiled and arranged to provide contact, forming through longitudinal channels of a closed cross section, and the module 3 of thin-layer purification itself is connected with the water treatment chamber 2 above and below the first partition, consisting of an upper vertical 5 part and a lower inclined 6 part with a length of not less than the length of the plate 13 of the thin-layer cleaning module 3, and with the filtration chamber 4 - above the second partition, consisting of the upper inclined 7 part with a length not less than the length of the plate 13 of the thin-layer cleaning module 3 and the lower vertical 8 part.

The lower edges of the inclined parts 6 and 7 of the first and second partitions are offset relative to the corresponding upper edges towards the filtration chamber 4 so that the stack of inclined plates 13 placed between the indicated inclined parts is located at an angle of 60° relative to the bottom of the cavity (not indicated in the drawings) .

The treated water supply unit is made in the form of a pipeline 19 with a diameter of 4% of the width of the cavity of the housing 1, oriented vertically and equipped with three nozzles 20 for pressure supply of reagents placed in series and from bottom to top, the distance between which is 35% of the width of the cavity of the housing 1.

The output of the treated water supply unit is located above the first horizontal grate 11 with a mesh size of 5 mm, the area of which is limited by the housing walls (not indicated in the drawings) and the upper vertical 5 part of the first partition.

Between the first and second partitions, a fourth partition 10 is installed vertically, with the formation of a horizontal gap with the upper edge of the second partition, the side edges of which are rigidly attached to the longitudinal walls of the housing 1.

In the water treatment chamber 2, a third partition 9 is located with a slope towards the filtration chamber 4 and at an angle of 30° relative to the bottom of the cavity, the upper edge of which is rigidly connected to the transverse wall of the housing 1, and the lower edge is located below the first partition.

For all four partitions, the side edges are rigidly attached to the longitudinal walls of the housing 1, and the upper and lower edges are oriented perpendicular to the longitudinal walls of the housing 1.

In the gap between the lower edges of the first 6 and third 9 partitions, a flow distributor is installed in the form of elements 16 oriented perpendicular to the longitudinal walls of the housing 1 and located parallel to each other with the formation of a gap between them, while the elements 16 of the flow distributor are made with l-shaped cross sections, the tops of which lie in a common plane and are directed towards the outlet of the treated water supply unit.

In the space of the water treatment chamber 2, limited by the walls of the housing 1, the first horizontal grate 11, the first 5 and 6 and the third 9 partitions and the flow distributor 16, there is a floating load 14 in the form of cubes of polystyrene foam with a side size of 10-20 mm, the total volume which is ½ of the volume of the cavity of the housing 1, and at the bottom of the chamber 2 of the water treatment there is a pipeline 17 for the removal of sediment.

In the filtration chamber 4 there is a filter load 15, which is used as crushed PSBS granules with a fraction of 3 mm, bounded from above by a second horizontal grate 12 with a mesh size of 1 mm, above which are placed sensors pH 23 and the upper level 24 of coagulated water, and in the lower part of the chamber 4 filtration placed the sensor 25 of the lower level and the perforated pipeline 18 for the removal of filtered water, at the inlet of which a mesh is fixed (not shown in the drawings).

The claimed device works as follows.

Purified water with a pressure of 10-20 m is introduced into the pipeline 19, regulating its supply with the help of a gate 21 according to the readings of the flow meter 22.

Chemical reagents are introduced into the pipeline 19 through pipes 20 in the direction from the bottom to the top with a counterpressure of 1-2 kg/cm ² , the addition mode of which can be controlled (for example, sequentially after the start of the input of treated water or simultaneously with the start of input of treated water).

The prepared liquid, which consists of no more than four components, enters the cavity of the body 1 from the outlet of the treated water supply unit and, after damping the pressure, flows through the cells of the first horizontal grate 11 into the water treatment chamber 2.

Further, the total liquid flow in contact with the floating load 14 is divided into many predominantly laminar flows, during the mixing of which the formation of coagulated flakes occurs.

The coagulated water flows down the surface of the third baffle 9 and is divided into predominantly laminar flows, passing through the elements 16 of the flow distributor.

Further, the coagulated water enters the thin-layer purification module 3, where, in the process of its movement from bottom to top along the through longitudinal channels of the inclined plates 13, the coagulated flakes precipitate, which settles on the bottom of the water treatment chamber 2 and is removed in a volume of 2-5% through the outlet pipeline 17 draft.

Then the coagulated water with the remnants of the flakes overflows over the upper edge of the second baffle and enters the filtration chamber 4. In the presence of the fourth partition 10, the coagulated water with the remnants of the flakes enters the filtration chamber 4 through the horizontal gap between the specified partition and the upper inclined 7 part of the second partition.

Further, the coagulated water passes by gravity through the filtering load 15, which allows you to separate the remaining flakes, after which the filtered water is discharged through the perforated pipeline 18.

When the filter load 15 is silted, the upper level sensor 24 registers the excess of the maximum water level in the filtration chamber 4 and sends to the control unit (not shown in the drawings) the signals for opening and closing the corresponding gates (not shown in the drawings), there is a burst discharge of water from the filtration chamber 4 , as a result, the filter load 15 expands and falls to the bottom of the filtration chamber 4, and the contaminants are carried away with the flow of water through the perforated pipeline 18 for the removal of filtered water.

Subsequently, the water from washing the filter load 15 is returned to the treatment plant (to the pumping station for supplying water for treatment), and the sediment is returned to the thickener, where it is separated into fractions. The liquid fraction is returned to the treatment plant, while the thick fraction is mechanically dehydrated or removed by a special vehicle.

The authors have developed a water treatment plant with the ability to control its performance from 2 to 4 m ³ /h with the following parameters:

- the width of the body cavity is 1 m;

- the treated water supply pipeline is made in the form of a steel pipe according to GOST 10704-91 “Steel electric-welded longitudinal pipes. Assortment";

- floating loading is made of PS-1 polystyrene styrofoam slab produced in accordance with TU 6-05-1178-87E “Polystyrene tiled polystyrene foam. Specifications";

- the filtering load is made of expanded polystyrene plate produced in accordance with GOST 15588-86 “Polystyrene foam plates. Specifications";

- the first horizontal grating is made in the form of a stainless mesh No. 5 according to GOST 5017-74 "Stainless woven mesh";

- the second horizontal grating is made in the form of a stainless mesh No. 1 according to GOST 5017-74 "Stainless woven mesh";

- inclined plates are made of C-21 sheet size 10 according to GOST 24045-95. "Galvanized corrugated board".

Treatment of the internal surfaces of the unit is provided depending on the aggressiveness of the treated water in accordance with SP 28.13330.2012 Protection of building structures against corrosion. For conditions of a highly aggressive environment: the outer and inner surfaces of the product are painted with epoxy coatings.

The surfaces of the product are made with epoxy coatings.

To confirm the operability of the proposed device, a series of tests of a pilot industrial sample was carried out using three compositions of reagents:

- a known composition containing a coagulant aluminum polyoxychloride (introduced through the lower nozzle of the pressure supply of reagents), an alkalizing agent Na ₂ CO ₃ (introduced through the middle nozzle of the pressure supply of reagents) and a flocculant Praestol 852BC (introduced through the upper nozzle of the pressure supply of reagents);

- a composition developed by the authors and containing a coagulant - a 10% solution of aluminum sulfate (alumina), activated by seawater ions, which is made by dissolving alumina in seawater and is introduced through the lower nozzle of the pressure supply of reagents, and an alkalizing agent - 5% milk of lime introduced through the middle nozzle of the pressure supply of reagents, while the upper nozzle of the pressure supply of reagents is closed with a plug;

- a composition developed by the authors and containing the coagulant Aqua-Aurat ³⁰ (introduced through the lower nozzle of the pressure supply of reagents) and the flocculant Praestol 852BC (introduced through the upper nozzle of the pressure supply of reagents), previously dissolved in a 10% Na ₂ CO ₃ solution and injected through the middle branch pipe for the pressure supply of reagents, while the upper branch pipe for the pressure supply of reagents is closed with a plug.

The ratio of Aqua-Aurat ³⁰ : Na ₂ CO ₃ : Praestol 852VS by weight is 100:100:1.

The results of field tests of a pilot industrial sample are shown in table 1.

Table 1
The content of pollutants in wastewater Classic input of reagents
10% aluminum polyoxychloride solution + 10% Na ₂ CO ₃ solution + 1% Praestol 852BC solution Wastewater The optimal dose of coagulant for Al ₂ O ₃ ,
mg/l suspended solids,
mg/l BOD ₅ ,
mg/l Oil products,
mg/l Residual aluminum,
mg/l Household after a local grease trap 50 127-140*
10-15** 115-240
10-15 Not
fixed _____
0.03 Surface runoff from undeveloped territory 38 50-328
10-15 20-48
5-7 Not
fixed _____
0.04 Oily effluents after a local oil trap 27 25-40
10-15 12-17
5-6 5-7****
0.78-1.02 ______
0.035 10% solution of aluminum sulfate (alumina) dissolved in sea water + 5% milk of lime Household after a local grease trap 25/108/31*** 127-140
10-15 115-240
8-11 Not
fixed 0.03 Surface runoff from undeveloped territory 18/108/25 50-328
10-15 20-48
5-6 Not
fixed 0.04 Oily effluents after a local oil trap 14/106/21 25-60
10-15 12-17
4-5 5-7
0.7-0.9 0.04 10% solution of Aqua-Aurat ³⁰ + Praestol 852VS, dissolved in 10% solution of Na ₂ CO ₃
at a mass ratio of 100 (Aqua-Aurat ³⁰ ): 100 (Na ₂ CO ₃ ): 1 (Praestol 852VS) Household after a local grease trap 44 127-140
10-15 115-240
9-12 Not
fixed 0.03 Surface runoff from undeveloped territory 29 50-328
10-15 20-48
4-6 Not
fixed _____
0.04 Oily effluents after a local oil trap 21 25-60
10-15 12-17
4-5 5-7
0.69-0.92 ______
0.04

Note:

* - initial concentrations of wastewater pollution;

** - concentrations of wastewater pollution after chemical treatment;

*** - Al ₂ O ₃ / Mg ²⁺ /Ca ²⁺ - quantitative ratio of active coagulating substances (reagents) in the composite composition developed by the authors;

**** - for oily wastewater, an additional control indicator is oil products.

The test results confirm the high efficiency of the developed design of the installation both for the use of classical reagents and for composite compositions.

The results of hydraulic tests of the filter bed show that the increase in head loss in the crushed polystyrene foam bed did not exceed 4.5 cm/h at a maximum filtration rate of 5 m/h, and the filter cycle was 20 hours.

The increase in the water level in the space above the filter was recorded according to the readings of the water measuring tube. The tests were carried out for a filter bed made of crushed polystyrene foam with a fraction of 3 mm and a layer height of 0.8 m under boundary conditions: the concentration of suspended solids entering the filtration was C _N = 15-20 mg/l (after passing through the water treatment chamber and the thin-layer purification module ) and C _L =3-5 mg/l at the outlet of the filter media.

The period of water passage from the beginning of their contact with the first reagent to the exit from the installation lasted 50 minutes, in contrast to classical treatment facilities, where the duration of the processes of mixing with reagents, flocculation, sedimentation and filtration is on average 2 hours.

The coagulated, clarified and filtered liquid was transparent and did not have a specific sewage odor.

Given the above, we can conclude that the reagent treatment in the proposed device can significantly reduce the content of pollutants within a short period of time of 50 minutes.

The claimed invention can be used for chemical treatment of different types of water:

- in water treatment systems;

- surface (rain, melt, from wet cleaning of the road surface);

- industrial waste water.

Claims (3)

1. A water treatment plant containing a treated water supply unit, a housing whose cavity is divided into chambers, a flow distributor and a thin-layer purification module made in the form of a package of inclined plates, characterized in that the housing cavity is made in the form of a rectangular parallelepiped with a width ratio of length and height as 1:2:2 and is divided by partitions into sequentially placed and connected water treatment chamber, a thin-layer purification module and a filtration chamber, and the thin-layer purification module is in communication with the water treatment chamber above and below the first partition, consisting of an upper vertical part and a lower an inclined part with a length not less than the length of the thin-layer module plate, and with a filtration chamber - above the second partition, consisting of an upper inclined part with a length not less than the length of the thin-layer module plate and a lower vertical part, the lower edges of the inclined parts of the first and second partitions being displaced relative to the corresponding upper edges towards the filtration chamber in such a way that the stack of inclined plates placed between the indicated inclined parts is located at an angle of 60° relative to the bottom of the cavity, and the inclined plates of the thin-layer cleaning module are profiled and arranged to ensure contact, forming through longitudinal channels of a closed cross section in addition, the treated water supply unit is in communication with the water treatment chamber and its outlet is located above the first horizontal grate with a mesh size of 5 mm, the area of which is limited by the walls of the housing and the upper vertical part of the first partition, while the third partition with a slope is located in the water treatment chamber towards the filtration chamber and at an angle of 30° relative to the bottom of the cavity, the upper edge of which is rigidly connected to the transverse wall of the housing, and the lower edge is located below the first partition, in addition, for all partitions, the side edges are rigidly attached to the longitudinal walls of the housing, and the upper and lower edges are oriented perpendicular to the longitudinal walls of the housing, and in the gap between the lower edges of the first and third partitions, a flow distributor is installed in the form of elements oriented perpendicular to the longitudinal walls of the housing and located parallel to each other with the formation of a gap between them, while the elements of the flow distributor are made with l-shaped transverse sections, the tops of which lie in a common plane and are directed towards the outlet of the treated water supply unit, and at the bottom of the water treatment chamber there is a sediment removal pipeline, in addition, in the space of the water treatment chamber, limited by the walls of the housing, the first horizontal grate, the first and third partitions and a flow distributor; , bounded from above by a second horizontal grate with a mesh size of 1 mm, above which sensors are placed for pH and the upper level of coagulated water, and in the lower part of the filtration chamber there is a lower level sensor and a perforated filtered water outlet pipeline, in addition, the treated water supply unit is made in the form pipeline with a diameter of 4% of the width of the body cavity, is oriented vertically and is equipped with three nozzles for pressure supply of reagents placed in series and from bottom to top, the distance between which is 35% of the width of the body cavity. 2. A water treatment plant according to claim 1, characterized in that a mesh is fixed at the inlet of the perforated filtered water outlet pipe. 3. The water treatment plant according to claim 1, characterized in that between the first and second partitions vertically, with the formation of a horizontal gap with the upper edge of the second partition, a fourth partition is installed, the side edges of which are rigidly attached to the longitudinal walls of the housing.

Images